Interspecific tree named &#39;Amigo III&#39;

ABSTRACT

A new and distinct variety of interspecific tree. The following features of the tree and its fruit are characterized with the tree budded on ‘Nemaguard’ Rootstock (non-patented), grown on Handford sandy loam soil with Storie Index rating 95, in USDA Hardiness Zone 9, near Modesto, Calif., with standard commercial fruit growing practices, such as pruning, thinning, spraying, irrigation and fertilization. Its novelty consist of the following combination of desirable features: 
     1. Tree with vigorous, upright growth.
 
2. Heavy and regular bearer of medium to large size fruit.
 
3. Fruit with good handling and shipping quality.
 
4. Fruit with very good flavor and eating quality.
 
5. Fruit with an average 17.6° Brix.

BOTANICAL DESIGNATION

Interspecific Prunus species

VARIETY DENOMINATION

‘Amigo III’

BACKGROUND OF THE VARIETY Field of the Invention

In the field of plant genetics, we conduct an extensive and continuingplant-breeding program including the organization and asexualreproduction of orchard trees, and of which plums, peaches, nectarines,apricots, cherries, almonds and interspecifics are exemplary. It wasagainst this background of our activities that the present variety ofinterspecific tree was originated and asexually reproduced by us in ourexperimental orchard located near Modesto, Stanislaus County, Calif.

Prior Varieties:

Among the existing varieties of interspecific and plum trees, which areknown to us, an mentioned herein, ‘Flavor Supreme’ Interspecific (U.S.Plant Pat. No. 6,763), ‘Coparose’ Interspecific (U.S. Plant Pat. No.20,173), our non-patented proprietary interspecific seedlings ‘66Z68’,‘44GH13’ and our non-patented proprietary plum seedlings ‘276LF278’,‘19GF223’ and ‘38RC246’.

Statement Regarding Federally Sponsored Research and Development:

Not applicable.

Origin of the Variety:

The new and distinct interspecific tree was originated by us fromcrosses between the following species; Prunus salicina and Prunusarmeniaca. The present variety was selected as a first generation crossbetween our proprietary non-patented plum seedling with the fieldidentification number ‘276LF278’ and our non-patented interspecificseedling ‘66Z68’. The seed parent 276LF278 (non-patented) plumoriginated as a first generation cross between our proprietarynon-patented plum seedlings ‘19GF223’ and ‘38RC246’. The interspecificpollen parent ‘66Z68’ (non-patented) originated as a first generationcross between the interspecific ‘Flavor Supreme’ (U.S. Plant Pat. No.6,763) and the non-patented interspecific apricot seedling with ourfield identification number ‘44GH13’. We budded a large number of theseseedlings to older ‘Nemaguard’ Rootstock (non-patented) trees to induceearlier fruit production for evaluation. Under close and carefulobservation the present seedling exhibited desirable fruit and treecharacteristics and was selected in 2000 for additional asexualpropagation and commercialization.

Asexual Reproduction of the Variety:

In 2000 asexual reproduction of the new and distinct variety ofinterspecific tree was by budding to ‘Nemaguard’ Rootstock(non-patented), as performed by us in our experimental orchard locatednear Modesto, Calif., and shows that reproductions run true to theoriginal tree and all characteristics of the tree and its fruit areestablished and transmitted through succeeding asexual propagations.

Summary of the New Variety:

The present new and distinct variety of interspecific tree,[Plum×((Plum×Plumcot)×(Apricot×Plumcot))] is of large size, vigorous,upright growth and a regular and productive bearer of medium to largesize, yellow flesh, clingstone fruit with very good flavor and eatingquality. The fruit is further characterized by holding firm on the tree3 weeks after maturity (shipping ripe) and having good storage andshipping quality. In comparison to its non-patented seed parent(276LF278) the fruit of the new variety is larger in size. In comparisonto its non-patented interspecific pollen parent ‘66Z68’ the fruit of thenew variety is larger in size and is approximately 45 days later inmaturity. In comparison to the commercial variety ‘Coparose’Interspecific (U.S. Plant Pat. No. 20,173) the fruit of the new varietyis larger in size and is approximately 10 days later in maturity.

DESCRIPTION OF THE PHOTOGRAPH

The accompanying color photographic illustration shows typical specimensof the foliage and fruit of the present new interspecific variety. Theillustration shows the upper and lower surface of the leaves, anexterior and sectional view of a single fruit divided in its sutureplane to show flesh color, pit cavity and the stone remaining in place.The photographic illustration was taken shortly after being picked(shipping ripe) from a 13 year old tree and the colors are as nearlytrue as is reasonably possible in a color representation of this type.

DESCRIPTION OF THE VARIETY

The following is a detailed botanical description of the new variety ofinterspecific tree, its flowers, foliage and fruit, as based onobservations of 13 year old specimens grown near Modesto, Calif., withcolor in accordance with Munsell Book of Color published in 1958.

-   Tree:    -   -   Size.—Large, pruned to 3 to 3.5 meters in height and width            for economical harvesting of fruit. Size varies with            different cultural practices.        -   Vigor.—Vigorous, tree growth of approximately 1.5 to 2            meters the first growing season. Varies with cultural            practices, soil type, fertility and climatic conditions.        -   Form.—Upright, usually pruned to vase shape.        -   Branching habit.—Upright, crotch angle approximately 30°,            increases with heavy crop load.        -   Productivity.—Productive, thinning and spacing of fruit            necessary for desired market size. Fruit set varies with            climatic conditions during bloom time.        -   Bearer.—Regular, adequate fruit set 11 consecutive years. No            alternate bearing observed.        -   Fertility.—Self-sterile, pollinator required.        -   Density.—Medium dense, usually pruned to vase shape to            increase sunlight and air movement to center of tree to            enhance fruit quality and health of fruit spurs.        -   Hardiness.—Hardy in all stone fruit growing areas of            California. Tree grown in USDA Hardiness Zone 9. Winter            chilling requirement approximately 650 hours at or below 45°            F.-   Trunk:    -   -   Size.—Large. Average circumference 66.7 cm at 28.0 cm above            ground on a 10 year old tree.        -   Stocky.—Medium stocky.        -   Texture.—Medium shaggy, roughness increases with age.        -   Color.—Varies from 5Y 4/2 to 5Y 3/2.-   Branches:    -   -   Size.—Large. Average circumference 16.3 cm at 1.2 meters            above ground. Crotch angle approximately 30°, increases with            heavy crop load.        -   Surface texture.—New growth relatively smooth. Mature growth            medium rough, roughness increases with age.        -   Lenticels.—Average number 37 in a 25.8 sq cm section.            Average length 4.8 mm. Average width 2.8 mm. Color varies            from 7.5YR 6/8 to 7.5YR 5/10.        -   Color.—New growth varies from 2.5GY 5/8 to 7.5R 3/4. Mature            growth varies from 10YR 2/2 to 2.5Y 2/2, varies with age of            growth.-   Leaves:    -   -   Size.—Medium. Average length 109.4 mm. Average width 44.0            mm.        -   Form.—Oblanceolate.        -   Apex.—Acuminate.        -   Base.—Cuneate.        -   Margin.—Doubly serrate.        -   Thickness.—Medium.        -   Surface texture.—Upper surface relatively smooth, slight            indentations over midrib and leaf veins. Lower surface            relatively smooth, except for small ridges created by midrib            and pinnate venation. Both upper and lower surfaces            glabrous.        -   Petiole.—Medium. Average length 13.4 mm. Average width            1.4 mm. Longitudinally grooved. Surface-light pubescence.            Color varies from 5GY 6/6 to 5GY 5/6.        -   Glands.—Type — globose. Number varies from 1 to 5, average            number 3. Average length 0.7 mm. Average width 0.5 mm.            Located primarily on the upper portion of petiole and the            base of the leaf blade. Color varies from 2.5GY 6/6 to 5GY            6/6.        -   Stipules.—Average number 2. Average length 5.2 mm. Edges —            doubly serrate. Color 5GY 4/8.        -   Color.—Upper surface 10Y 3/2 to 10Y 2/2. Lower surface            varies from 7.5Y 4/4 to 10Y 4/2. Midvein color varies from            10Y 7/4 to 2.5GY 6/6.-   Flower buds:    -   -   Size.—Small to medium. Average length 9.1 mm. Average            diameter 5.0 mm.        -   Hardiness.—Hardy with respect to California winters.        -   Form.—Conical, becoming elongated just before opening.        -   Pedicel.—Average length 5.8 mm. Average width 0.7 mm. Color            varies from 2.5GY 8/6 to 2.5GY 7/8. Surface — glabrous.        -   Color.—N 9.5/ (white).        -   Number of buds per spur.—Varies from 6 to 12, average            number 9. Varies with age of spur.-   Flowers:    -   -   Blooming period.—Date of First Bloom Feb. 19, 2014. Date of            Petal Fall Mar. 1, 2014, varies slightly with climatic            conditions.        -   Size.—Medium to large. Average height 10.4 mm. Average            diameter 19.5 mm.        -   Petals.—Normally 5, alternately arranged to sepals. Size —            small to medium. Average length 9.9 mm. Average width            7.2 mm. Form — elliptical. Apex — rounded. Base — rounded to            somewhat truncated. Arrangement — free. Margin — sinuate.            Color N 9.5/ (white). Both upper and lower surfaces            glabrous.        -   Sepals.—Normally 5, alternately arranged to petals. Size —            small. Average length 2.4 mm. Average width 2.6 mm. Shape —            triangular. Apex rounded. Margin — entire. Both upper and            lower surfaces glabrous. Color — upper surface varies from            2.5GY 7/6 to 2.5GY 6/6. Lower surface varies from 2.5GY 6/6            to 5GY 7/6.        -   Stamens.—Average number per flower 29. Average filament            length 7.1 mm. On average, the stamens are even with the            height of the petals. Filament color N 9.5/ (white). Anther            color varies from 5Y 8/8 to 5Y 7/10.        -   Pollen.—Self-sterile, pollinator required. Color varies from            2.5Y 7/10 to 5Y 7/10.        -   Pistil.—Number — normally 1. Average length 7.3 mm.            Positions of stigma an average of 1.5 mm below anthers.            Surface — glabrous. Color varies from 10Y 8.5/4 to 10Y 7/6.        -   Fragrance.—Heavy aroma.        -   Color.—N 9.5/ (white).        -   Pedicel.—Average length 11.2 mm. Average width 0.7 mm. Color            varies from 2.5GY 7/8 to 2.5GY 6/6. Surface — glabrous.        -   Number flowers per flower bud.—Average 4, varies from 2 to            5.-   Fruit:    -   -   Maturity when described.—Firm ripe and ready for            consumption.        -   Date of first picking.—Jul. 11, 2014.        -   Date of last picking.—Jul. 21, 2014, varies slightly with            climatic conditions.        -   Size.—Medium to large. Average diameter axially 59.2 mm.            Average transversely in suture plane 64.8 mm., Average            weight 161.9 grams, varies slightly with fertility of the            soil, amount of thinning and climatic conditions.        -   Form.—Globose.        -   Suture.—Smooth to very slightly lipped, extends from base to            apex.        -   Ventral surface.—Nearly smooth.        -   Apex.—Slightly retuse.        -   Base.—Slightly retuse.        -   Stem cavity.—Rounded to slightly elongated in suture plane.            Average depth 5.2 mm. Average diameter 9.1 mm.-   Stem:    -   -   Size.—Medium. Average length 13.0 mm. Average diameter 2.8            mm.        -   Color.—Varies from 7.5YR 3/4 to 10YR 3/6.-   Skin:    -   -   Thickness.—Medium.        -   Surface.—Smooth.        -   Bloom.—Moderate amount, completely covered.        -   Tendency to crack.—Very slight.        -   Color.—Ground color varies from 5Y 6/6 to 7.5Y 8/6.            Overspread with 5R 4/6 to 7.5R 3/6. Small, randomly spaced            areas of exposed ground color giving a speckling pattern to            the surface.        -   Tenacity.—Tenacious to flesh.        -   Astringency.—Undetected.-   Flesh:    -   -   Ripens.—Evenly.        -   Texture.—Firm, meaty.        -   Fibers.—Few, small, tender.        -   Firmness.—Firm, having good handling and shipping quality.        -   Aroma.—Moderate.        -   Amydgalin.—Undetected.        -   Eating quality.—Very good.        -   Flavor.—Very good, a good balance between acid and sugar.        -   Juice.—Heavy amount, enhances flavor.        -   Acidity.—Not available.        -   Brix.—Average Brix 17.6°, varies slightly with amount of            fruit- per tree and climatic conditions.        -   Color.—Varies from 2.5Y 8/4 to 5Y 8/6.        -   Pit cavity.—Average length 29.3 mm. Average width 22.4 mm.            Average depth 6.0 mm. Color 2.5Y 7/6 to 5Y 7/6.-   Stone:    -   -   Type.—Clingstone, strong adherence to flesh.        -   Size.—Medium to large. Average length 28.3 mm. Average width            21.4 mm. Average thickness 11.2 mm.        -   Form.—Obovoid.        -   Base.—Flat.        -   Apex.—Slightly pointed. Average length 0.5 mm.        -   Surface.—Slightly pitted throughout. One shallow groove on            each side of suture extending from base to apex.        -   Sides.—Unequal, one side extending further outward from            suture plane.        -   Ridges.—Very small, extending from base toward apex.        -   Tendency to split.—None.        -   Color.—Varies from 10YR 6/6 to 10YR 5/8 when dry.-   Kernel:    -   -   Size.—Medium. Average length 15.5 mm. Average width 11.1 mm.            Average depth 6.5 mm.        -   Form.—Ovoid.        -   Viability.—Viable, complete embryo development.        -   Skin color.—Varies from 5Y 9/4 to 7.5Y 9/4.-   Use: Dessert. Market — local and long distance.-   Keeping quality: Good, held firm 3 weeks at 38° to 42° F. without    internal breakdown of flesh or appreciable loss of flavor.-   Shipping quality: Good, minimal skin scarring or bruising of flesh    during picking, packing and shipping trials.-   Plant/fruit disease resistance/susceptibility: No specific testing    for relative plant/fruit disease resistance/susceptibility has been    designed. Under close observation during planting, growing, and    harvesting of fruit, under normal cultural and growing conditions    near Modesto, Calif., no particular plant/fruit disease resistance    or susceptibility has been observed. Any variety or selection    observed during indexing of plant characteristics with abnormal    fungus, bacterial, virus or insect susceptibility is destroyed and    eliminated from our breeding program. No atypical    resistances/susceptibilities have been noted under normal cultural    practices. The present new variety of interspecific tree, its    flowers, foliage and fruit herein described may vary in slight    detail due to climate, soil conditions and cultural practices under    which the variety may be grown. The present description is that of    the variety grown under the ecological conditions prevailing near    Modesto, Calif.

1. A new and distinct variety of interspecific tree, substantially asillustrated and described.